Black/stem rust/rust of wheat
Causal organism/Pathogen of Black/stem rust/rust of wheat
Puccinia graminis tritici.
Symptoms of Black/stem rust/rust of wheat
Black rust is first marked by an eruption of elongated brown pustale on the stalk, leaf sheaths and leaves. These pustules may be quater of an inch or more in length and frequently run into one another. They very soon brust, exposing a brown powder consisting thousands of uredospores. Later on teleutosoric developed. The teleutospores are often produced in the same sorus as he uredospores and as they are darker in colour, one can see he pustules gradually changing from brown to black as the season advances.
Recurrence of of Black/stem rust/rust of wheat
The pathogen are air borne. The pathogen pass their life cycle on two different hosts, wheat and barberry, which are abundantly found in hilly region. The summer heat in the plains that follows the wheat harvest kills all the uredospores of rusts.
Control measures/Management of Black/stem rust/rust of wheat
i. Grow rust-resistant varieties.
ii. Avoid late sowing and late maturing varieties.
iii. Don’t use excess amount of nitrogenous fertilizer.
iv. Remove barberry plant from crop field.
v. Spraying Zineb or Mancozeb 75 WP.